Question

What is acquired immunity ? Explain the 3 features of acquired immunity

Answer 1

Explanation:

Acquired immunity: Immunity acquired by infection or vaccination (active immunity) or by the transfer of antibody or lymphocytes from an immune donor (passive immunity). Acquired immunity is in contrast to innate immunity (natural immunity).

• Specificity: Acquired immunity is specific for each type of pathogen.
• Diversity: It has the ability to recognize vast variety of diverse pathogens or foreign molecules.
• Discrimination between self and non-self: It is able to differentiate between own cells (self) and foreign cells or molecules.

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Answer 2

Answer:

Unique features of acquired immunity:

1. Specificity: Specificity is the ability to differentiate various foreign molecules that invade the body. Acquired immunity is therefore specific for each type of pathogen.

2. Diversity: Diversity is the ability to recognize a vast variety of diverse pathogens or foreign molecules.

3.Discrimination between self and non-self: Due to this feature of acquired immunity, the body is able to differentiate between own cells, i.e. self and foreign cells or molecules. i.e. non-self.

4. Memory: When a specific pathogen is acted upon for the first time, there is immune response generated to eliminate this pathogen. The immune system retains the memory of this encounter. As a result, when same pathogen once again enters the body there is a quicker and heightened immune response.

Explanation:

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